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39 * Structures and constants for the SCSI RDMA Protocol (SRP) as
40 * defined by the INCITS T10 committee. This file was written using
41 * draft Revision 16a of the SRP standard.
44 #include <linux/types.h>
62 SRP_BUF_FORMAT_DIRECT = 1 << 1,
63 SRP_BUF_FORMAT_INDIRECT = 1 << 2
68 SRP_DATA_DESC_DIRECT = 1,
69 SRP_DATA_DESC_INDIRECT = 2
73 SRP_TSK_ABORT_TASK = 0x01,
74 SRP_TSK_ABORT_TASK_SET = 0x02,
75 SRP_TSK_CLEAR_TASK_SET = 0x04,
76 SRP_TSK_LUN_RESET = 0x08,
77 SRP_TSK_CLEAR_ACA = 0x40
80 enum srp_login_rej_reason {
81 SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,
82 SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,
83 SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
84 SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,
85 SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
86 SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,
87 SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006
91 SRP_REV10_IB_IO_CLASS = 0xff00,
92 SRP_REV16A_IB_IO_CLASS = 0x0100
95 struct srp_direct_buf {
102 * We need the packed attribute because the SRP spec puts the list of
103 * descriptors at an offset of 20, which is not aligned to the size of
104 * struct srp_direct_buf. The whole structure must be packed to avoid
105 * having the 20-byte structure padded to 24 bytes on 64-bit architectures.
107 struct srp_indirect_buf {
108 struct srp_direct_buf table_desc;
110 struct srp_direct_buf desc_list[0];
111 } __attribute__((packed));
114 SRP_MULTICHAN_SINGLE = 0,
115 SRP_MULTICHAN_MULTI = 1
118 struct srp_login_req {
122 __be32 req_it_iu_len;
127 u8 initiator_port_id[16];
128 u8 target_port_id[16];
132 * The SRP spec defines the size of the LOGIN_RSP structure to be 52
133 * bytes, so it needs to be packed to avoid having it padded to 56
134 * bytes on 64-bit architectures.
136 struct srp_login_rsp {
139 __be32 req_lim_delta;
141 __be32 max_it_iu_len;
142 __be32 max_ti_iu_len;
146 } __attribute__((packed));
148 struct srp_login_rej {
158 struct srp_i_logout {
164 struct srp_t_logout {
173 * We need the packed attribute because the SRP spec only aligns the
174 * 8-byte LUN field to 4 bytes.
176 struct srp_tsk_mgmt {
182 __be64 lun __attribute__((packed));
191 * We need the packed attribute because the SRP spec only aligns the
192 * 8-byte LUN field to 4 bytes.
199 u8 data_out_desc_cnt;
203 __be64 lun __attribute__((packed));
213 SRP_RSP_FLAG_RSPVALID = 1 << 0,
214 SRP_RSP_FLAG_SNSVALID = 1 << 1,
215 SRP_RSP_FLAG_DOOVER = 1 << 2,
216 SRP_RSP_FLAG_DOUNDER = 1 << 3,
217 SRP_RSP_FLAG_DIOVER = 1 << 4,
218 SRP_RSP_FLAG_DIUNDER = 1 << 5
222 * The SRP spec defines the size of the RSP structure to be 36 bytes,
223 * so it needs to be packed to avoid having it padded to 40 bytes on
224 * 64-bit architectures.
230 __be32 req_lim_delta;
235 __be32 data_out_res_cnt;
236 __be32 data_in_res_cnt;
237 __be32 sense_data_len;
238 __be32 resp_data_len;
240 } __attribute__((packed));
242 struct srp_cred_req {
246 __be32 req_lim_delta;
250 struct srp_cred_rsp {
257 * The SRP spec defines the fixed portion of the AER_REQ structure to be
258 * 36 bytes, so it needs to be packed to avoid having it padded to 40 bytes
259 * on 64-bit architectures.
265 __be32 req_lim_delta;
269 __be32 sense_data_len;
272 } __attribute__((packed));
280 #endif /* SCSI_SRP_H */